Research Article

A Nonlinear Controller for Neutral Point Piloted (T-Type) Multilevel Inverter-Based Three-Phase Four-Wire DSTATCOM

Table 3

The performance of DSTATCOM under different loading conditions.

Load (%)Load powerfactorLoad side currents (rms, A)Load side (%) THDSource powerfactorSource side currents (rms, A)Source side (%) THD
IlaIlbIlca phaseb phasec phaseIsaIsbIsca phaseb phasec phase

1000.8 lagging40602021.726.2628.23Unity4545432.282.53.02
0.5 lagging30501027.731.2729.03Unity363737.52.933.84.15
0.3 lagging2248831.8533.8629.43Unity3334353.415.24.75

600.8 lagging25371322.328.6229.28Unity2625253.133.74.01
0.5 lagging20321027.731.2730.67Unity2021223.794.54.53
0.3 lagging1829832.5835.8029.56Unity1718174.405.46.15

300.8 lagging1319823.926.2628.23Unity1412143.433.94.02
0.5 lagging1117629.233.2631.30Unity1110113.994.84.65
0.3 lagging914534.8239.2334.43Unity9894.465.86.35